AVALIAÇÃO DE CARGA MINERAL ESFÉRICA E LAMELAR NOS PARÂMETROS DE QUALIDADE DE MASSA COM EFEITO MARMORIZADO

Abstract

The growing demand for architectural paints with different finishes is driving research into the effect of mineral fillers on the properties of these paints. This study investigates how different types of mineral fillers affect the quality parameters of marbled materials, a popular technique in decorative finishes. Currently, the literature highlights the importance of the physical characteristics of mineral fillers, such as particle shape and size, in determining the final properties of paints, but specific studies on putties for marbled effects are scarce. In this work, a base mass formula was developed for a marbled effect in which only the type of mineral filler used was varied: calcium carbonate (spherical in shape) and talc (in lamellar shape). The quality parameters evaluated were: pH, consistency, non-volatile solids, specific weight, applicability, drying and gloss. The results showed that the most significant variation occurred in the specific mass and brightness properties. The lamellar mineral filler provided a high shine, while the spherical mineral filler gave the dough a matte appearance for a marbled effect. It is concluded that the choice of mineral filler is crucial to achieve the desired characteristics in the final product, and the study of the effects of mineral fillers is essential to evaluate the quality and cost-benefit of paint formulations.